Machine for polishing press-board.



No. 743,062. PATENTEDNOV.3,1903.

S. E.DART. MACHINE FOR POLISHING PRESS BOARD.

APPLICATION FILED AUG.18, 1903.

N0 MODEL.

UNITED STATES Patented November 3, 1908.

PATENT. OFFICE.

SAMUEL E. DART, OF SOUTH MANCHESTER, CONNECTICUT, ASSIGNOR OF ONE-HALF TO THE ROGERS PAPER MANUFACTURING COMPANY, IN- CORPORATED, OF SOUTII MANCHESTER, CONNECTICUT, A CORPORA- TION OF CONNECTICUT.

MACHINE FUOR PQLISEHINVG PRESS-BOARD.

SPECIFICATION forming part of Letters Patent No. 43,(362, dated November 3, 1903. Application filed August 18, 1903. Serial No. 169,888. (No model.)

To all whom it may concern:

Be it known thatl, SAMUEL E. DART, a citizen of the United States, residing at South Manchester, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements inMachines for Polishing Press-Board, of which the following is a specification.

Press-board is finished by the friction of a polisher which is heavily pressed down upon and rapidly rubbed back and forth on the sur- I face of the board. The machine ordinarily used for this purpose has an upright frame supporting an oscillatory beam which at its lower end carries a polisher that is pressed with great force upon a concaved bed as the reduce the curve in the bed, the pivot of the oscillatory beam must bea considerable distanee above the bed, and toprovide for this the frame must be high. To obtain heavy pressure with the polisher and to resist vibration, the frame must be strong and the bed solid, and to oscillate the polisher without a large expenditure of power the crank must be connected with thebeam at a considerable distance from the pivot of the beam.

acter be built cheaply, that it be assembled quickly, and that it be capable of being taken down and moved to another part of the plant and reset with little delay and at a small cost. It is desirable that the foundation have a slight spring in order to reduce the noise and effect better results.

A cast-iron frame is not suitable for a ma chine of this character on account of the cost of producing and setting up the large pieces necessary for-a high frame, and such large pieces seriously cut off light and interfere with the movements of the operator. Wood is objectionable, for the reason that very large and heavy timbers would be required, and these not only obstruct the light and interfere with the movements of the workmen, but swell and contract under the varying changes of temperature and humidity of the atmosphere and lack rigidity. Structural iron or steel cannot be employed on account of cost. A frame built of such material lacks rigidity unless the parts are specially formed and permanently riveted together and requires the employment of skilled artisans for assembling or resetting the frame.

The object of this invention is to provide a construction which will be cheap to build,

strong and firm, easy to reset,will not ob structlight, and will give large sheets of board a smooth hard finish and luster without curling them up.

The machine illustrated as embodying this pipe which can bepurchased in the open market and set up by an ordinary millwright, the pipe being spread at the base and tied together by rods to obtain strength and allow operators free access to the bed. Longrods pass through the pipe and heavy foundationtimbers and heavy head-blocks. The bed is supported on the timber foundation, so that it may be adjusted vertically and horizontally beneath a long vertical beam which carries the polisher, and at the top is pivoted to the head and near the bottom is connected with a crank, that is also supported on the timber foundation.

invention has a tall upright frame built of Figure l of the accompanying drawings shows an edge elevation of a machine that embodies the invention. Fig. 2 shows a side elevation of the same, and Fig. 3 shows adetail of construction.

The foundation of the machine consists of heavy longitudinal timbers 1, mounted on transverse timbers 2. The frame is formed of four upright-pipes 3,the lower ends of which extend into sockets 4, set in the longitudinal timbers, and the upper ends of which extend into sockets 5, setinto the head-blocks 6. The frame-pipes are spread apart at the bottom in the plane of the oscillation of the polisher, so as to resist the strains. ed ends extend through the pipes and through the longitudinal and transverse foundationtimbers and also through the head-blocks and have nuts 8 screwed upon their threaded ends, so as to .draw the parts together and hold the ends of the pipes in the sockets. Brace-pipes 9 are arranged between the head-blocks, and extending through these pipes and the head blocks are rods 10 with threaded ends having nuts 11,which when turned up draw the headblocks against the ends .of the pipes. Bracepipes 12 are arranged between the front and back frame-pipes, and brace-pipes 13 are arranged between the side pipes of the frame. Eyes 14, with enlarged heads 15, are hooked into holes in the pipes of the frame, and these are connected from side to side by tie-rods 16, which are provided with swivels 17, whereby they may be strained to draw the parts together. Eyes 18 are fasten ed to the pipes of the frames in a similar manner and are connected by tie-rods 19, provided with swivels 20 for tying the frame-pipes together front and back. A shaft 21 is fastened to the head-blocks, and a horizontal beam 22 is hinged to this shaft. Fastened to this horizontal beam is a vertical pipe 23, to the lower end of which the ends for bracing and straining the parts.

The polisher-head has a common burnisher 28 and is connected by a link 29 with a crank 30 on a shaft 31, that has fast and loose pulleys 32 and 33 and is supported by a standard 34. This standard is bolted to the longitudinal timbers of the foundation and is also tied to the foundation by a pipe 35, through which extends a rod 36, with nuts on its threaded ends. The bed-plate 37 is held by a bed 38, which is secured to a longitudinal foundation timber beneath the beam and is adjusted so that the polisher will bear down upon it with great pressure uniformly throughout its entire length as the beam is oscillated. The upper surface of the bed-plate is curved on the arc of a circle the center of which is the axis of the pivot of the polisher-beam, and the bed-plate may be ad- Rods 7 with threadjusted vertically by turning nuts 39 under the ends and may be adjusted longitudinally by turning the hand-wheel 40 at one end. The pipe, rods, nuts, and swivels from which this frame is constructed can be purchased in the open market and can be assembled by any millwright. This construction allows the machine to be set up quickly and taken down and reset without loss of time. The pipe are rigid and are firmly held together by the tension of the nuts on the rods that pass through the pipe and by the tension of the swivels on the tie rods. The timbers which form the foundation provide a sufficient cushion to reduce the noise and to allow just enough give to effect good results. There is no shrinking or contracting of the tall frame, and the small pipes do not obstruct the light or interfere with the movements of the operators about the bed.

This machine, without being costly, can be made large, so that great pressure can be obtained upon the board to be polished and so that the oscillations may be given without the expenditure of great power, and the surface of the bed, which is long enough to support sheets of considerable width, is comparatively flat, so that the paper will not curl, but will lie flat and smooth when finished.

The invention claimed is- 1; A polishing-machine having a foundation, pipes extending upwardly from the foundation, head blocks supported by the pipes, rods extending through the pipes, the head-blocks and the foundation and provided with nuts for drawing the parts together, a vertical beam pivotally supported by the head-blocks, a polisher carried by the beam, a crank connected with the beam and a bed supported by the foundation beneath the polisher, substantially as specified.

2. A polishing-machine having a foundation, pipes extending upwardly from the foundation, head blocks supported by the pipes, rods extending through the pipes and through the head-blocks and the foundation and provided with nuts for drawing the parts together, tie rods with swivels extending between the pipes, a vertical beam pivotally supported by the headblocks, a polisher carried by the beam, a crank connected with the beam, and a bed supported by the foundation beneath the polisher, substantially as specified.

3. A polishing-machine having a foundation, pipes extending upwardly from the foundation, head-blocks supported by the pipes, rods extending through the pipes and through the head-blocks and the foundation and provided with nuts for drawing the parts together, tie-rods with swivels extending between the pipes, a vertical beam pivotally supported by the head-blocks, a polisher carried by the beam, a crank connected with the beam, a bed supported by the foundation beneath the polisher, and means for adjusting polisher carried by the vertical beam, tierods with swivels connecting the polisher end of the vertical beam with the ends of the :5

horizontal beam, a crank connected with the lower end of the vertical beam, a bed supported by the foundation beneath the polisher, and means for adjusting the bed, substantially as specified.

SAMUEL E. DART.

Witnesses:

HARRY R. WILLIAMS, ETHEL M. LOWE. 

